Bridge.



J.A.LYNOH.

BRIDGE. APPLIOATION FILED APR. 30, 1910. 1,007,299. v Patented 001131, 1911.

2 SHEETSSHEET l.

COLUMBIA PLANOGRAFH JO-.WASIHNGTON. D. C.

' J. A. LYNCH.

BRIDGE. APPLICATION FILED APR. 30, 1910.

1,007,299, I Patented Oct. 31, 1911.

2 SHEETS-SHEET 2. 7

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COLUMBIA PLANOGRAPH 60.. WASHING row. 0. c.

JOHN A. LYNCH, 0F SPOKANE, WASHINGTON.

BRIDGE.

Specification of Letters Patent.

Patented Oct. 31, 1911.

Application filed April 30, 1910. Serial No. 558,543.

[0 all whom it may concern:

Be it known that I, JOHN A. LYNCH, a citizen of the United States, residing at Spokane, in the county of Spokane and State of Washington, have invented new and useful Improvements in Bridges, of which the following is a specification.

This invention relates to reinforced concrete structures and particularly to tubular architrave bridges.

The object of the invention is the provision of such a structure which is adapted for use on railway, public high-way or other bridges and also for the support of buildings of any character wherein a tubular architrave structure may be used in connection with a tubular column.

A further object of the invention is the construction of a bridge of this character whereby great quantities of cement are eliminated and thereby the cost 'of the bridge reduced. A particular advantage in structures of this type is the small primary cost and the small maintenance cost, such as painting, replacing loose rivets, and other portions of metallic structures.

A still further object of the invention which may be considered under the heading of reduced primary cost, is the fact that sliding forms may be used instead of building forms from the foundation, covering the entire surface as is generally practiced in present concrete structures.

Further objects of the invention will appear as the specific description, which follows, is read in connection with the accompanying drawings, which form a part of this specification, and in which Figure 1 is a side elevation. Fig. 2 is a longitudinal section. Fig. 3 is a transverse section on the line 3-3 of Fig. 1. Fig. 4 is a transverse section on the line 44 of Fig. 1. Fig. 5 is a horizontal section on the line 55 of Fig. 1. Fig. 6 is a longitudinal section of a modification.

Referring more particularly to the drawings, 1 represents the foundation which may be constructed of any suitable material, such as concrete, or the like, and will resemble the foundation employed in any other type of bridge. If such foundation or footing shows any signs of settlement, the piles 2 are driven into the ground and the foundation set thereon in the manner shown.

In the drawings, there are shown two separate foundations A and B upon which are mounted the tubular columns or piers 3 having arches 4 formed at their upper ends, and mounted upon the arches 4: is the architrave 5 which connects the piers. The architrave is preferably of tubular form with a trough 6 formed in its upper face, which gradually deepens from the center of the arch to a point immediately over the center of the arch 4. This trough is filled with suitable ballast 7 or other filling material, upon which the road bed may be mounted, or upon which the ties and rails of a railroad may be placed.

In constructing the columns and architraves, reinforcing rods 8 and 9 are placed therein, the former extending horizontally around the tubular structure and radially of the architrave, while the reinforcing rods 9 extend vertically of the column and longitudinally of the architraves. The vertical rods in the column and the longitudinal rods in the architrave may be one and the same, or they may be separate rods and connected together in any suitable manner.

In practice, it may be found expedient to interlace the horizontal and vertical rods, but for purposes of convenience they have been shown separate herein and the only point upon which stress may be laid is that the vertical rods extend entirely throughout the structure from one column to another, whether of separate connected rods or comprising integral members.

In the structure shown in Fig. 6, the architraves are mounted directly upon the columns and a suitable ballast or filling 10 fills the architraves and the columns in the manner shown. In place of this type of structure, a bridge or platform may be constructed across the top of the column so as to support the ballast or filling and thus avoid the expense of filling the entire column. The reinforcing rods in this structure are similarly placed to those shown in Figs. 1 to 5.

Having thus described the invention, what is claimed is 1. In a monolithic construction, the combination of a plurality of tubular columns, and tubular architraves connecting said columns, together with a ballast carried in the architraves.

2. In a monolithic construction, the combination with a plurality of tubular 001- umns, tubular arches formed thereon, tubular arohitraves mounted on said arches, horizontal reinforcing members extending around said tubular column, and embedded therein, vertical reinforcing members embedded in the column, longitudinal reinforcing members embedded in the architraves, and connected to the vertical reinforcing members of the column, and a trough formed in the upper part of the tubular architraves, together With a ballast filling said trough.

3. A monolith comprising a plurality of tubular columns and a tubular architrave connecting the same.

4:. A monolith comprising a plurality of tubular columns, tubular architraves connecting the same, and connected reinforcing means in the columns and architraves.

In testimony whereof I aliix my signature in presence of tWo Witnesses.

JOHN A. LYNCH.

WVitnesses:

E. F. BoYLns, D. J. OGALLAI-IAN.

Copies of this'patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

